add release procedure
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+<!--
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements. See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+# Project Management Committee Documentation
+
+## Release Procedure
+
+1. Generate code signing key if you do not already have one for Apache. Refer to
+http://apache.org/dev/openpgp.html#generate-key on how to generate a strong code
+signing key.
+2. Add your public key to the `KEYS` file at the root of the source code tree.
+3. Create a new release branch, with version bumped to the next release version.
+ 1. `git checkout -b release/0.9.9`
+ 2. Replace all `0.9.9.dev0` in the code tree to `0.9.9`.
+ 3. `git commit -am "Prepare 0.9.9rc1"`
+ 4. `git tag -am "Apache PredictionIO Python SDK 0.9.9rc1" v0.9.9rc1`
+4. Package a binary/source files.
+ 1. `python setup.py sdist bdist_wheel`
+5. Generate MD5 and SHA512 checksums for the release candidates in dist directory.
+ 1. `gpg --print-md MD5 PredictionIO-0.9.9-py3-none-any.whl >
+ PredictionIO-0.9.9-py3-none-any.whl.md5`
+ 2. `gpg --print-md SHA512 PredictionIO-0.9.9-py3-none-any.whl >
+ PredictionIO-0.9.9-py3-none-any.whl.sha512`
+ 3. `gpg --print-md MD5 PredictionIO-0.9.9.tar.gz >
+ PredictionIO-0.9.9.tar.gz.md5`
+ 4. `gpg --print-md SHA512 PredictionIO-0.9.9.tar.gz >
+ PredictionIO-0.9.9.tar.gz.sha512`
+6. Generate detached signature for the release candidate.
+(http://apache.org/dev/release-signing.html#openpgp-ascii-detach-sig)
+ 1. `gpg --armor --output PredictionIO-0.9.9-py3-none-any.whl.asc
+ --detach-sig PredictionIO-0.9.9-py3-none-any.whl`
+ 2. `gpg --armor --output PredictionIO-0.9.9.tar.gz.asc
+ --detach-sig PredictionIO-0.9.9.tar.gz`
+7. If you have not done so, use SVN to checkout
+ https://dist.apache.org/repos/dist/dev/incubator/predictionio/sdk-python.
+ This is the area for staging release candidates for voting.
+ 1. `svn co https://dist.apache.org/repos/dist/dev/incubator/predictionio/sdk-python`
+8. Create a subdirectory at the SVN staging area. The area should have a `KEYS` file.
+ 1. `mkdir 0.9.9rc1`
+ 2. `cp PredictionIO-0.9.9* 0.9.9rc1`
+9. If you have updated the `KEYS` file, also copy that to the staging area.
+10. `svn commit`
+13. Wait for Travis to pass build on the release branch.
+14. Tag the release branch with a rc tag, e.g. `0.9.9rc1`.
+15. Send out e-mail for voting on PredictionIO dev mailing list.
+
+ ```
+ Subject: [VOTE] Apache PredictionIO SDK Python 0.9.9 Release (RC1)
+
+ This is the vote for 0.9.9 of Apache PredictionIO.
+
+ The vote will run for at least 72 hours and will close on Apr 7th, 2017.
+
+ The release candidate artifacts can be downloaded here:
+ https://dist.apache.org/repos/dist/dev/incubator/predictionio/sdk-python/0.9.9rc1/
+
+ Test results can be found here:
+ https://travis-ci.org/apache/incubator-predictionio-sdk-python/builds/XXXXXX
+
+ To install this python module:
+ $ pip install PredictionIO-0.9.9.tar.gz
+ or
+ $ pip3 install PredictionIO-0.9.9-py3-none-any.whl
+
+ The artifacts have been signed with Key : YOUR_KEY_ID
+
+ Please vote accordingly:
+
+ [ ] +1, accept RC as the official 0.9.9 release
+ [ ] 0, neutral because...
+ [ ] -1, do not accept RC as the official 0.9.9 release because...
+ ```
+16. Publish files to PyPI if the vote is passed.
+ 1. `twine upload dist/PredictionIO-0.9.9.tar.gz dist/PredictionIO-0.9.9.tar.gz.asc \
+ dist/PredictionIO-0.9.9-py3-none-any.whl dist/PredictionIO-0.9.9-py3-none-any.whl.asc`
+17. Create release tag
+ 1. `git tag -am "Apache PredictionIO Python SDK 0.9.9" v0.9.9`
+18. Merge release/0.9.9 into master and develop branch
+19. Bump up version in setup.py on develop branch
+
